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J & D Construction
Trusted and professional extension builder in SW20. Experienced in all extension buildering work and keeping within budget and on quote. J & D Cons...
ACE BUILDING CONTRACTORS AND D
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
The Bleu Group
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
You Nailed It Ltd
At You Nailed It Ltd we have been fitting bespoke bathrooms since 2008.It is a well-known fact that bathrooms sell houses. They also add a ...
Flanagan Construction Ltd
Tom Flanagan
Very experienced Builder in this area ,Epsom Sutton Raynes pk Wimbledon areas mostly now on recommendation usually also supply Drawings&a Structu...
Artin Construction
Artin Construction is an established extension buildering business in SW20. We come highly recommended and provide competitive quotes for your work...
TTG CONSTRUCTION LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Racsel Building Services Ltd
Trusted and professional extension builder in SW20. Experienced in all extension buildering work and keeping within budget and on quote. Racsel Bui...
TRITON BUILDING RESTN LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Flat roof extension cost in SW20
A flat roof extension ranges from the cheapest of £22,064 (You Nailed It Ltd based in SW19) to the dearest of £22,416 (ACE BUILDING CONTRACTORS AND D based in SW19), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in SW20 by posting a job with HaMuch. We'll send it to extension builders in SW20.
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- Factors affecting the cost of flat roof extensions
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Estimates for common extension builder jobs in SW20;
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.
Underpin a building - £17,709
Two storey extension - £88,313
Build a timber frame extension - £26,209
Build a swimming pool - £81,209
Single storey extension - £59,176
Side return extension - £43,849
Install an RSJ - £2,409
Outbuilding - £10,209
Build a Mansard loft conversion - £52,209
Loft conversion - £35,708
Build a kitchen extension - £42,209
Hip to gable loft conversion - £42,209
Granny annexe - £87,209
Garden office - £10,209
Convert a Garage - £16,209
Garage - £18,709
Build a flat roof extension - £22,209
Build a dormer loft conversion - £42,209
Concrete foundations - £6,459
Convert a bungalow loft - £29,209
Convert a basement - £39,849